Gas-liquid enhanced reaction system of ozone contact tank

Abstract

The invention discloses a gas-liquid enhanced reaction system of an ozone contact tank, which comprises the ozone contact tank and a first micro-interface unit, and the first micro-interface unit comprises a first micro-interface generator and a second micro-interface generator which are connected in parallel. Ozone can be crushed and dispersed to form ozone microbubbles; the second micro-interface generator is provided with a liquid inlet used for inputting liquid (raw water or waste water and the like), and the liquid can be crushed and dispersed to form liquid microbubbles. An outlet of the first micro-interface generator is communicated with an outlet of the second micro-interface generator through a hedging pipeline, and the hedging pipeline is communicated with the ozone contact tank. The ozone microbubbles and the liquid microbubbles can realize hedging in the hedging pipeline, so that the ozone can be crushed and dispersed twice, the crushing and dispersing effect of the ozone is improved, the mass transfer area of the ozone and wastewater in the ozone contact tank is increased, and the oxidation treatment effect of the wastewater is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of wastewater treatment, and specifically relates to a gas-liquid enhanced reaction system of an ozone contact tank. Background Art

[0002] Ozone oxidation technology is limited by its own process and is currently mainly used in the post-treatment process of wastewater to achieve the purpose of deep treatment of wastewater and improvement of wastewater standards.

[0003] When ozone oxidation technology is used to improve wastewater quality, it typically utilizes either an ozone contact oxidation tower or an ozone contact tank. The use of a contact oxidation tower requires additional equipment, potentially increasing process costs. In contrast, since ozone contact tanks are typically large, the wastewater within them can be considered "static," with ozone reacting primarily through aeration.

[0004] In related technologies, ozone is usually introduced into wastewater through aeration equipment such as gas distributors or microporous aeration plates to participate in the reaction. The mass transfer coefficient of ozone in wastewater is small and the interfacial area is limited, resulting in low efficiency of the oxidation reaction between ozone and wastewater, low ozone utilization rate, and poor wastewater treatment effect. Summary of the Invention

[0005] In order to solve the technical problem in the related art that ozone is introduced into wastewater to participate in the reaction using aeration equipment such as a gas distributor or a microporous aeration disk, resulting in poor wastewater treatment effect, the present application provides a gas-liquid enhanced reaction system for an ozone contact tank, the gas-liquid enhanced reaction system comprising:

[0006] ozone contact tank;

[0007] The first micro-interface unit includes a first micro-interface generator and a second micro-interface generator connected in parallel. The first micro-interface generator is equipped with a gas inlet, and the second micro-interface generator is equipped with a liquid inlet. The outlet of the first micro-interface generator is connected to the outlet of the second micro-interface generator through a counter-pipe, and the counter-pipe is connected to the ozone contact tank.

[0008] In some embodiments, the first micro-interface generator and the second micro-interface generator are both located outside the ozone contact tank.

[0009] In some embodiments, the first micro-interface generator is located below the second micro-interface generator.

[0010] In some embodiments, the second micro-interface generator and the first micro-interface generator are located in the same vertical direction.

[0011] In some embodiments, the gas-liquid enhanced reaction system further comprises:

[0012] The second micro-interface unit is arranged in the ozone contact tank, and the inlet of the second micro-interface unit is connected with the flushing pipe.

[0013] In some embodiments, the second micro-interface assembly includes:

[0014] A plurality of built-in micro-interface generators are in communication with the counter-hedge pipe.

[0015] In some embodiments, the plurality of built-in micro-interface generators include:

[0016] The third micro-interface generator, the fourth micro-interface generator and the fifth micro-interface generator, the third micro-interface generator and the fourth micro-interface generator are arranged in the middle of the ozone contact tank, and the fifth micro-interface generator is arranged at the bottom of the ozone contact tank.

[0017] In some embodiments, the third micro-interface generator and the fourth micro-interface generator are arranged at the same height, the outlet of the third micro-interface generator and the outlet of the fourth micro-interface generator are respectively facing the side walls of the ozone contact tank, and the outlet of the fifth micro-interface generator is facing the bottom of the ozone contact tank.

[0018] In some embodiments, the gas-liquid enhanced reaction system further comprises:

[0019] A liquid circulation pump is arranged between the ozone contact tank and the second micro-interface generator.

[0020] In some embodiments, the gas-liquid enhanced reaction system of the ozone contact tank further comprises:

[0021] An ozone generator and an ozone eliminator, wherein the inlet of the ozone generator is communicated with the ozone contact tank, the outlet of the ozone generator is communicated with the gas inlet, and the ozone eliminator is communicated with the ozone contact tank.

[0022] In some embodiments, the first micro-interface assembly further comprises:

[0023] A feed pump, wherein the outlet of the feed pump is connected to the liquid inlet.

[0024] In some embodiments, a liquid filter is provided between the feed pump and the second microinterface generator.

[0025] In some embodiments, an oxidizing liquid overflow port is provided at the top of the ozone contact tank.

[0026] According to the gas-liquid enhanced reaction system of the ozone contact tank provided by one or more embodiments of the present application, the gas-liquid enhanced reaction system includes an ozone contact tank and a first micro-interface unit. The first micro-interface unit includes a first micro-interface generator and a second micro-interface generator connected in parallel. Since the first micro-interface generator is equipped with a gas inlet for inputting ozone, and can break up and disperse ozone to form ozone microbubbles, the first breakup and dispersion of ozone is achieved. The second micro-interface generator is equipped with a liquid inlet for inputting liquid (which can be raw water or wastewater, etc.), and can break up and disperse the liquid to form liquid microbubbles. The outlet of the first micro-interface generator is connected to the outlet of the second micro-interface generator through a counter-pipe, and the counter-pipe is connected to the ozone contact tank. Then the ozone microbubbles and liquid microbubbles can be hedged in the hedge pipe to achieve the second crushing and dispersion of ozone. In this way, the ozone can be crushed and dispersed twice, improving the crushing and dispersion effect of ozone, thereby increasing the mass transfer area between ozone and wastewater, extending the oxidation reaction time between ozone and wastewater, promoting the occurrence of oxidation reaction between ozone and wastewater, and improving the reaction effect between ozone and wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic structural diagram of a gas-liquid enhanced reaction system of an ozone contact tank in one or more embodiments of the present application;

[0028] Figure 2 This is a structural schematic diagram of the gas-liquid enhanced reaction system of the ozone contact tank in one or more embodiments of the present application (the first micro-interface generator and the second micro-interface generator are not in the same straight line).

[0029] Description of reference numerals:

[0030] 1. Ozone contact tank; 4. First micro-interface unit; 401. First micro-interface generator; 402. Second micro-interface generator; 403. Hedge pipe; 5. Second micro-interface unit; 501. Third micro-interface generator; 502. Fourth micro-interface generator; 503. Fifth micro-interface generator; 6. Liquid circulation pump; 7. Ozone generator; 8. Ozone eliminator; 9. Gas outlet; 10. Feed pump; 11. Liquid filter; 12. Oxidation liquid overflow port. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to understand the present application more clearly, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of this application.

[0032] Ozone oxidation technology is limited by its own process and is currently mainly used in the post-treatment process of wastewater to achieve the purpose of deep treatment of wastewater and wastewater quality improvement. Ozone oxidation technology in related technologies has the following defects:

[0033] 1. Low ozone utilization rate: Ozone gas in the ozone contact tank exists in the form of large bubbles, with limited interfacial area and low mass transfer efficiency; the bubbles rise quickly and have a short residence time; ozone has low solubility in water, and some ozone dissolved in water will decompose into oxygen, resulting in low ozone utilization rate and useless ozone loss, which increases the cost of wastewater treatment.

[0034] 2. Ozone's oxidizing ability is limited: Ozone can only oxidize unsaturated functional groups, resulting in the limited oxidizing ability of ozone itself.

[0035] 3. Poor COD (Chemical Oxygen Demand) removal capacity: The concentration of hydroxyl radicals (·OH) in the ozone oxidation technology reaction system is low, the indirect oxidation effect of ozone is limited, and the oxidizing capacity of ozone itself is limited, resulting in poor COD removal capacity.

[0036] When ozone oxidation technology is used to improve wastewater quality, it typically utilizes either an ozone contact oxidation tower or an ozone contact tank. The use of a contact oxidation tower requires additional equipment, potentially increasing process costs. In contrast, since ozone contact tanks are typically large, the wastewater within them can be considered "static," with ozone reacting primarily through aeration.

[0037] Related technologies typically use aeration devices such as gas distributors or microporous aeration discs (generating millimeter or centimeter-sized bubbles) to introduce ozone into wastewater for reaction. However, ozone has a low mass transfer coefficient and limited interfacial area in wastewater, resulting in low ozone oxidation reaction efficiency and utilization, leading to poor wastewater treatment. Furthermore, the ozone exhaust from the ozone contact tank contains high ozone content, resulting in a strong odor.

[0038] To solve the above technical problems, please refer to Figure 1The present application provides a gas-liquid enhanced reaction system for an ozone contact tank, which includes an ozone contact tank 1 and a first micro-interface unit 4. The first micro-interface unit 4 includes a first micro-interface generator 401 and a second micro-interface generator 402 connected in parallel. Since the first micro-interface generator 401 is equipped with a gas inlet for inputting ozone, the first micro-interface generator 401 can break up and disperse ozone to form ozone microbubbles, thereby achieving the first breakup and dispersion of ozone. The second micro-interface generator 402 is equipped with a liquid inlet for inputting liquid (which may be raw water or wastewater, etc.), and the second micro-interface generator 402 breaks up and disperses the liquid to form liquid microbubbles. The outlet of the first micro-interface generator 401 is connected to the outlet of the second micro-interface generator 402 through a counter-pipe 403, and the counter-pipe 403 is connected to the ozone contact tank 1. Then the ozone microbubbles and liquid microbubbles are transported from both ends of the hedging pipe 403 to the inside of the hedging pipe 403 to achieve hedging, thereby realizing a second crushing and dispersion of the ozone. In this way, the ozone can be crushed and dispersed twice, thereby improving the crushing and dispersion effect of the ozone, thereby increasing the mass transfer area between ozone and wastewater, extending the oxidation reaction time between ozone and wastewater, promoting the occurrence of the oxidation reaction between ozone and wastewater, and improving the reaction effect between ozone and wastewater.

[0039] As the fragmentation and dispersion effect of ozone is improved, ozone exists in the form of small bubbles, which can reduce the rising speed of ozone in wastewater, increase the residence time of ozone in wastewater, and improve the oxidation reaction effect between ozone and wastewater.

[0040] The first micro-interface generator 401 and the second micro-interface generator 402 are micro-interface generators and can be configured into different structures and forms. For details, please refer to patent application numbers CN201610641119.6, CN201610641251.7, CN201710766435.0, CN105903425A, CN109437390A, CN205833127U and CN207581700U, etc., which will not be repeated in this application.

[0041] It should be noted that in order to improve the crushing and dispersion effect of ozone and the crushing and dispersion effect of liquid, multiple first micro-interface generators 401 can be provided, and multiple first micro-interface generators 401 can be connected in series; multiple second micro-interface generators 402 can also be provided, and multiple second micro-interface generators 402 can also be connected in series.

[0042] See also Figure 1The first micro-interface generator 401 and the second micro-interface generator 402 are both located outside the ozone contact tank 1 and above the ozone contact tank 1. To improve the fragmentation and dispersion effect of ozone, the first micro-interface generator 401 is disposed below the second micro-interface generator 402. The ozone microbubbles processed by the first micro-interface generator 401 can move under the action of buoyancy, while the liquid microbubbles processed by the second micro-interface generator 402 can move under the action of gravity. This can reduce the power required to move the ozone microbubbles and the liquid microbubbles, thereby improving economic efficiency. At the same time, the liquid microbubbles and the ozone microbubbles can be hedged in the hedge pipe 403 to fragment and disperse the ozone, increase the mass transfer area between the ozone and the wastewater, extend the oxidation reaction time between the ozone and the wastewater, promote the occurrence of the oxidation reaction between the ozone and the wastewater, and improve the reaction effect between the ozone and the wastewater.

[0043] In order to improve the impact and dispersion effect of liquid microbubbles and ozone microbubbles in the flushing pipe 403, please refer to Figure 1 The second micro-interface generator 402 and the first micro-interface generator 401 are located in the same vertical direction, which allows for direct collision between the liquid microbubbles and the ozone microbubbles, thereby improving the fragmentation and dispersion of the ozone. This prevents the liquid microbubbles and the ozone microbubbles from separately impacting the inner wall of the counter-coupling pipe 403 due to bending, thereby reducing the collision force between the liquid microbubbles and the ozone microbubbles and affecting the fragmentation and dispersion of the ozone.

[0044] The first micro-interface unit 4 and the second micro-interface unit 5 break up and disperse the ozone into micro-bubbles at the micron level, thereby increasing the residence time of ozone in the wastewater and slowing down the rising speed of ozone, thereby extending the reaction time between ozone and wastewater, improving the ozone utilization rate and wastewater treatment effect, reducing ozone waste, and improving the utilization rate of ozone.

[0045] To further enhance the fragmentation and dispersion of ozone, the gas-liquid enhanced reaction system further comprises a second micro-interface unit 5. Since the inlet of the second micro-interface unit 5 is connected to the counter-flow pipe 403 and is disposed within the ozone contact tank 1, the second micro-interface unit 5 can further fragment and disperse the ozone, thereby increasing the mass transfer area between the ozone and the wastewater, improving the oxidation reaction rate and depth between the ozone and the wastewater, and thus improving the utilization rate of the ozone. At the same time, the ozone microbubbles fragment and disperse in the wastewater within the ozone contact tank 1. The energy generated by the fragmentation can decompose the water molecules in the wastewater into active hydroxyl radicals, thereby increasing the concentration of hydroxyl radicals (·OH) in the wastewater and improving the indirect oxidation reaction effect of the wastewater. At the same time, the ozone itself decomposes into oxygen and an active oxygen species in the wastewater to undergo an oxidation reaction with the wastewater. Both of these methods can effectively oxidize the wastewater within the ozone contact tank 1, improving the oxidation efficiency of the wastewater within the ozone contact tank 1, and thus improving the oxidation treatment effect of the wastewater. Therefore, the gas-liquid enhanced reaction system of the ozone contact tank not only uses the first micro-interface unit and the second micro-interface unit to increase the gas-liquid mass transfer area between ozone and wastewater, thereby improving the oxidation treatment effect of the wastewater, but also uses the crushing energy of the generated ozone microbubbles when they break to improve the oxidation treatment effect of the wastewater.

[0046] See also Figure 1 The second micro-interface unit 5 includes multiple built-in micro-interface generators connected to the hedge pipe 403. While the built-in micro-interface generators can achieve the fragmentation and dispersion of ozone, the ozone microbubbles can also be transported to different positions in the ozone contact tank 1 through multiple built-in micro-interface generators. This can increase the oxidation reaction rate of the wastewater in the ozone contact tank 1, thereby increasing the oxidation treatment rate of the wastewater.

[0047] Multiple built-in microinterface generators include a third microinterface generator 501, a fourth microinterface generator 502 and a fifth microinterface generator 503. The third microinterface generator 501 and the fourth microinterface generator 502 are arranged in the middle of the ozone contact tank 1, and the fifth microinterface generator 503 is arranged at the bottom of the ozone contact tank 1.

[0048] Specifically, the third micro-interface generator 501 and the fourth micro-interface generator 502 are arranged at the same height, with the outlets of the third micro-interface generator 501 and the fourth micro-interface generator 502 respectively facing the side walls of the ozone contact tank 1, thereby enabling transverse circulation and stirring of the mixture within the ozone contact tank 1, accelerating the contact between ozone and wastewater. The outlet of the fifth micro-interface generator 503 faces the bottom of the ozone contact tank 1, thereby enabling stirring of the mixture at the bottom of the ozone contact tank 1, accelerating the contact between ozone and wastewater. At the same time, the outlet of the fifth micro-interface generator 503 faces the bottom of the ozone contact tank 1, thereby forming an offset with the bottom, thereby achieving the effect of stirring the mixture within the entire ozone contact tank 1. If the fifth micro-interface generator 503 is arranged above or the second micro-interface unit 5 is arranged in the middle and upper part of the ozone contact tank 1, an effective offset and stirring effect cannot be achieved.

[0049] The third micro-interface generator 501, the fourth micro-interface generator 502 and the fifth micro-interface generator 503 are micro-interface generators, and their working principles are the same as those of the first micro-interface generator 401 and the second micro-interface generator 402, so they will not be repeated here.

[0050] See also Figure 1 The gas-liquid enhanced reaction system of the ozone contact tank is equipped with a first micro-interface unit 4 outside the ozone contact tank 1 and a second micro-interface unit 5 inside the ozone contact tank 1. It can crush and disperse the wastewater and ozone gas entering the ozone contact tank 1 multiple times, increase the gas-liquid mass transfer area between ozone and wastewater, improve the oxidation treatment effect of wastewater, and thus effectively improve the utilization rate of ozone. Specifically, before entering the ozone contact tank 1, the wastewater and ozone are first crushed and dispersed by the first micro-interface unit 4, and the wastewater and ozone are crushed and dispersed into micron-sized bubbles. After entering the ozone contact tank 1, they are crushed and dispersed again by the second micro-interface unit 5, so that the ozone and wastewater are fully in contact, thereby improving the efficiency and oxidation depth of the ozone oxidation reaction.

[0051] The gas-liquid enhanced reaction system also includes a liquid circulation pump 6, see Figure 1The liquid circulation pump 6 is disposed between the ozone contact tank 1 and the second micro-interface generator 402. The liquid circulation pump 6 connects the ozone contact tank 1 and the second micro-interface generator 402 via a circulation pipe. The liquid circulation pump 6 is also connected to the ozone contact tank 1 via a control valve. When the control valve is opened, the liquid circulation pump 6 is started, and the wastewater in the ozone contact tank 1 can be transported to the second micro-interface generator 402 via the circulation pipe, thereby recycling the wastewater in the ozone contact tank 1. At this time, the feed pump 10 can be turned off, and the wastewater can be transported to the second micro-interface generator 402 via the liquid circulation pump 6. When the control valve is closed, the wastewater in the ozone contact tank 1 is no longer transported to the second micro-interface generator 402 via the circulation pipe. At this time, raw water can be transported to the second micro-interface generator 402 via the feed pump 10 and the liquid filter 11.

[0052] The gas-liquid enhanced reaction system of the ozone contact tank also includes an ozone generator 7 and an ozone eliminator 8. The ozone generator 7 is connected to the gas inlet and the gas outlet 9 at the top of the ozone contact tank 1. The ozone eliminator 8 is connected to the gas outlet 9 at the top of the ozone contact tank 1, so that part of the ozone discharged from the gas outlet 9 at the top of the ozone contact tank 1 is transported to the ozone eliminator 8 for purification, and the other part is transported to the ozone generator 7 for re-reaction. This can improve the treatment effect of wastewater while reducing ozone waste and increasing ozone utilization. It can also avoid environmental pollution and save energy and protect the environment.

[0053] See also Figure 1 The first micro-interface unit 4 further includes a feed pump 10 and a liquid filter 11. The outlet of the feed pump 10 is connected to the liquid inlet of the second micro-interface generator 402, and raw water can be delivered to the second micro-interface generator 402 through the feed pump 10. The liquid filter 11 is disposed between the feed pump 10 and the second micro-interface generator 402, so that the feed pump 10 is connected to the liquid inlet through the liquid filter 11. The raw water pressurized by the feed pump 10 can be filtered out of impurities in the raw water through the liquid filter 11, thereby preventing unfiltered raw water from entering the second micro-interface generator 402 and clogging the second micro-interface generator 402, thereby affecting the second micro-interface generator 402's ability to break up and disperse the raw water and the service life of the second micro-interface generator 402.

[0054] The ozone contact tank 1 is further provided with an oxidizing liquid overflow port 12 , which facilitates the collection of oxidizing liquid overflowing from the ozone contact tank 1 and also facilitates the sampling of the oxidizing liquid in the ozone contact tank 1 .

[0055] The ozone contact tank's gas-liquid enhanced reaction system operates as follows: air or oxygen is converted into ozone through ozone generator 7 and transported to first micro-interface generator 401, where it breaks down and disperses the ozone into ozone microbubbles. Raw water or wastewater is pressurized and filtered through feed pump 10 and liquid filter 11 before being transported to second micro-interface generator 402. Ozone broken down and dispersed by first micro-interface generator 401 and raw water or wastewater broken down and dispersed by second micro-interface generator 402 are counterbalanced in counterbalance pipe 403, further breaking up and dispersing the ozone. The gas-liquid micro-interface system is then transported via a transport pipe to third, fourth, and fifth micro-interface generators 501, 502, and 503. The third, fourth, and fifth micro-interface generators 501, 502, and 503 each break down and disperse the gas-liquid micro-interface system and transport the re-broken and dispersed gas-liquid micro-interface system to ozone contact tank 1. The gas-liquid enhanced reaction system of the ozone contact tank is easy to operate, has mild reaction conditions, and low energy consumption, and improves the oxidation treatment effect between ozone and wastewater.

[0056] In order to verify that the gas-liquid enhanced reaction system of the ozone contact tank can improve the oxidation treatment effect between ozone and wastewater, the inventors conducted experiments:

[0057] Comparative Example 1

[0058] The difference between Comparative Example 1 and the present application is that the second micro-interface unit 5 is not provided.

[0059] Comparative Example 2

[0060] The difference between Comparative Example 2 and the present application is that the fifth micro-interface generator 503 is arranged in the upper middle part of the ozone contact tank 1 with the outlet facing upward.

[0061] Comparative Example 3

[0062] The difference between Comparative Example 3 and the present application is that the first micro-interface generator 401 and the second micro-interface generator 402 of the first micro-interface unit 4 are not on the same straight line (e.g. Figure 2 shown).

[0063] Experimental Example: Taking the wastewater of a chemical gas-liquid product as an example, the wastewater was treated using the gas-liquid enhanced reaction systems of this application, Comparative Example 1, Comparative Example 2, and Comparative Example 3, respectively.

[0064] Among them, the wastewater volume is 60m 3 / h, COD is 100mg / L, gas flow rate is 3m 3 / min, where the ozone dosage concentration is 70 mg / L, the COD of the produced water at the oxidation liquid overflow port 12 is tested, and the effective utilization rate of ozone is calculated. The test results are shown in Table 1 below.

[0065] COD (mg / L) COD removal rate (%) Ozone effective utilization rate (%) This application 31.6 68.4 97.7 Comparative Example 1 46.5 53.5 76.4 Comparative Example 2 34.9 65.1 93.0 Comparative Example 3 36.9 63.1 90.1

[0066] Table 1

[0067] As can be seen from Table 1, the gas-liquid enhanced reaction system of the ozone contact tank of the present application can effectively purify wastewater and improve the quality of wastewater, and the effective utilization rate of ozone can reach 97.7%.

[0068] The ozone effective utilization rate in Comparative Example 1 is only 76.4% because, in the gas-liquid enhanced reaction system of Comparative Example 1, the ozone and wastewater (raw water) that are broken and dispersed by the first micro-interface unit 4 directly enter the ozone contact tank 1 to undergo an oxidation reaction with the wastewater. The ozone contact tank 1 does not have a second micro-interface unit 5, resulting in a low ozone effective utilization rate. In the present application, a second micro-interface unit 5 is provided, and the fifth micro-interface generator 503 in the second micro-interface unit 5 is disposed at the bottom of the ozone contact tank 1. In this way, the mixed liquid from the fifth micro-interface generator 503 is offset against the bottom wall of the ozone contact tank 1, thereby achieving the effect of stirring the mixed liquid in the entire ozone contact tank 1, achieving efficient ozone utilization, and improving the wastewater treatment effect.

[0069] The COD removal rate of Comparative Example 2 is lower than that of Example 1 because the fifth micro-interface generator 503 in Comparative Example 2 is arranged in the upper middle part of the ozone contact tank 1 with the outlet facing upward. The fifth micro-interface generator 503 cannot stir the mixture at the bottom of the ozone contact tank 1, thereby reducing the contact between ozone and wastewater, resulting in poor ozone treatment effect on wastewater.

[0070] The COD removal rate of Comparative Example 3 is lower than that of the present application because the first microinterface generator 401 and the second microinterface generator 402 of the first microinterface unit 4 in Comparative Example 3 are not on the same straight line, and the ozone microbubbles and liquid microbubbles are affected by the path in the counter-pressure pipe 403, which reduces the counter-pressure force between the two and affects the fragmentation and dispersion effect of the ozone, resulting in the mass transfer area between the ozone microbubbles and the wastewater being not as good as that of the present application. Therefore, the COD removal rate is lower than the COD removal rate of the present application.

[0071] Through the above experiments, the present application can improve the fragmentation and dispersion effect of ozone, thereby increasing the mass transfer area between ozone and wastewater in the ozone contact tank, improving the oxidation treatment effect of wastewater, and improving the utilization rate of ozone and the COD removal capacity.

[0072] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0073] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0074] In this application, unless otherwise specified or limited, the terms "connect," "fix," etc. should be understood broadly. For example, "fix" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0075] In addition, the terms "first," "second," and so on, used in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0076] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A gas-liquid enhanced reaction system for an ozone contact tank, characterized in that: The gas-liquid enhanced reaction system comprises: ozone contact tank; The first micro-interface unit includes a first micro-interface generator and a second micro-interface generator connected in parallel. The first micro-interface generator is equipped with a gas inlet, and the second micro-interface generator is equipped with a liquid inlet. The outlet of the first micro-interface generator is connected to the outlet of the second micro-interface generator through a counter-pipe, and the counter-pipe is connected to the ozone contact tank.

2. The gas-liquid enhanced reaction system of the ozone contact tank according to claim 1, characterized in that: The first micro-interface generator and the second micro-interface generator are both located outside the ozone contact tank.

3. The gas-liquid enhanced reaction system of the ozone contact tank according to claim 1, characterized in that: The first micro-interface generator is located below the second micro-interface generator.

4. The gas-liquid enhanced reaction system of the ozone contact tank according to claim 3, characterized in that: The second micro-interface generator and the first micro-interface generator are located in the same vertical direction.

5. The gas-liquid enhanced reaction system of the ozone contact tank according to any one of claims 1 to 4, characterized in that: The gas-liquid enhanced reaction system further comprises: The second micro-interface unit is arranged in the ozone contact tank, and the inlet of the second micro-interface unit is connected with the flushing pipe.

6. The gas-liquid enhanced reaction system of the ozone contact tank according to claim 5, characterized in that: The second micro-interface unit includes: A plurality of built-in micro-interface generators are in communication with the counter-hedge pipe.

7. The gas-liquid enhanced reaction system of the ozone contact tank according to claim 6, characterized in that: The plurality of built-in micro-interface generators include: The third micro-interface generator, the fourth micro-interface generator and the fifth micro-interface generator, the third micro-interface generator and the fourth micro-interface generator are arranged in the middle of the ozone contact tank, and the fifth micro-interface generator is arranged at the bottom of the ozone contact tank.

8. The gas-liquid enhanced reaction system of the ozone contact tank according to claim 7, characterized in that: The third micro-interface generator and the fourth micro-interface generator are arranged at the same height, the outlet of the third micro-interface generator and the outlet of the fourth micro-interface generator are respectively facing the side walls of the ozone contact tank, and the outlet of the fifth micro-interface generator is facing the bottom of the ozone contact tank.

9. The gas-liquid enhanced reaction system of the ozone contact tank according to any one of claims 1-4 and 6-8, characterized in that: The gas-liquid enhanced reaction system further comprises: A liquid circulation pump is arranged between the ozone contact tank and the second micro-interface generator.

10. The gas-liquid enhanced reaction system of the ozone contact tank according to claim 1, characterized in that: The gas-liquid enhanced reaction system of the ozone contact tank also includes: An ozone generator and an ozone eliminator, wherein the inlet of the ozone generator is communicated with the ozone contact tank, the outlet of the ozone generator is communicated with the gas inlet, and the ozone eliminator is communicated with the ozone contact tank.

11. The gas-liquid enhanced reaction system of the ozone contact tank according to claim 1, characterized in that: The first micro-interface unit also includes: A feed pump, wherein the outlet of the feed pump is connected to the liquid inlet.

12. The gas-liquid enhanced reaction system of the ozone contact tank according to claim 11, characterized in that: A liquid filter is provided between the feed pump and the second micro-interface generator.

13. The gas-liquid enhanced reaction system of the ozone contact tank according to claim 1, characterized in that: The top of the ozone contact tank is provided with an oxidizing liquid overflow port.

Images